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I'm using Embarcadero RAD Studio (Delphi).
Smart Card
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 91%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBK%3C/text%3E%3C/svg%3E)
Benedykt Kubica
1
Reputation point
How to use SmartCard library (SCardConnect, SCardEstablishContext, etc.) in Win64? They work perfectly well in Win32.
{count} votes
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Junjie Zhu - MSFT 14,751 Reputation points Microsoft Vendor2021-12-09T03:27:28.25+00:00 I have tested the function in 64-bit and found no problem. The program called C:\Windows\System32\WinSCard. DLL, so It can be used in win64. what problems you have in the process of using？
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Benedykt Kubica 1 Reputation point
2021-12-09T08:49:40.62+00:00 When I compile my code to 64 bit SCardConnectW returns code 6.
When I compile the same code to 32 bit the return code is 0 and of course everything is working perfectly well. -
Junjie Zhu - MSFT 14,751 Reputation points Microsoft Vendor
2021-12-09T09:35:13.08+00:00 I have no problem compiling in 64 bits, can you provide a minimal code sample without any privacy.
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Benedykt Kubica 1 Reputation point
2021-12-09T10:43:19.657+00:00 Connecting to SC
var
FReturnCode : Int64;
FContext: LongInt;
FCard: LongInt;FATR.Protocol: DWORD;
procedure TNFCWin.Connect(const AReader: string);
begin {Connect}
//Connect to reader using a shared connection
FReturnCode := 0;
FReturnCode := SCardConnectW(FContext,
PWideChar(AReader),
SCARD_SHARE_SHARED,
SCARD_PROTOCOL_T0 or SCARD_PROTOCOL_T1,
FCard,
@FATR.Protocol);if Success
then begin
GetATR(AReader);
FATR.CheckSCType;
CheckBlankCard;
CheckSCTypeFamily;
GetUID;
end;
end; {Connect}Calling SCardConnectW on Win32 returns 0 but on Win64 returns 6.
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Junjie Zhu - MSFT 14,751 Reputation points Microsoft Vendor
2021-12-10T07:04:55.87+00:00 An invalid handle was passed to the function, according to error code 6 returned. You can debug it to see if the handle is empty.
May I ask what language your code is using? I suggest you use C++ for testing. This is a sample.
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2 answers
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Benedykt Kubica 1 Reputation point
2021-12-13T15:13:20.17+00:00 -
Junjie Zhu - MSFT 14,751 Reputation points Microsoft Vendor
2021-12-14T02:21:11.6+00:00 Have you tried the C++ example and checked to see if there are invalid handles？
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Benedykt Kubica 1 Reputation point
2021-12-14T08:42:42.63+00:00 Currently I don't have C++ compiler so I cannot test it.
I found that in fact the problem is in SCardEstablishContext.
FReturnCode := SCardEstablishContext(SCARD_SCOPE_USER,
nil,
nil,
@FContext);In Win32 FReturnCode is 0 and the handle (FContext) is valid, i.e. SCardIsValidContext(FContext) returns 0.
In Win64 FReturnCode is still 0 but the handle is also 0, thus invalid.